peel 4" pvc from inside of hub

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by tp85, Nov 28, 2005.

  1. tp85

    tp85 New Member

    Messages:
    7
    how difficult is it to peel (perhaps literally piece by piece) 4" PVC from the inside of a hub fitting that was glued about 1 year ago?

    i've seen someone do this about 1 month after a rough-in to fix a leak. but not sure about after 1 year.

    got a real tight clearance situation, and this approach may be the easiest. however, don't really want to pick out a million small pieces.

    thanks,
    tom
  2. toolaholic

    toolaholic General Contractor Carpenter

    Messages:
    874
    Location:
    Marin Co. Ca.
    go to real plumbing supply house

    paco makes a special drill bitt to cut it out
  3. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    I have had fairly good luck using a large flat head screwdriver and a hammer and you just go around and around the hub until it pops out.
  4. tp85

    tp85 New Member

    Messages:
    7
    nice. :)

    could you give more details on how you do it? when you say pop out...i sounds like it comes out in one piece.

    maybe you hammer the screw driver inbetween the hub and pipe, then work around the circumference?


  5. plumber1

    plumber1 Plumber

    Messages:
    1,423
    Location:
    Florida
    Before I would use a hammer and screw, I would cut through the pipe and then chip out very carefully with screwdriver.
  6. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    Yes, with 4" I might be more apt to use a more narrow screwdriver so as to cause as little damage to the hub as possible or start with a wide one and as I got into the hub go with a more narrow one. No guarantees though
  7. bigrebnc1861

    bigrebnc1861 Plumber

    Messages:
    37
    Location:
    Kannapolis N.C.
    A toruch works wonders

    The screw driver and hammer works good but you should be very careful or you can knock a chip out of the fitting. You can also use a soldering tourch and flathead screw driver to seal a leak on pvc. To do this heat the tip of the screw driver until the tip is cherry red. Take one edge of the screw driver and drag the tip along the joint of the pipe and fitting. Keep doing this until the leak is sealed. But unless you have had some experince doing this I wouldn't try it,or chipping the pipe out of the fitting. I would advise you to either get the inside fitting cutter or get three coupling's and a new tee and replace the whole thing.
  8. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,688
    Location:
    Cave Creek, Arizona
    pipe

    Tighten a large hose clamp around the outside of the hub at the top first so you do not break the hub. Then melt or cut a slot in one side of the pipe through to the inside of the hub. Then you should be able to drive a thin screwdriver between the pipe and hub to start the separation. Then using a second screwdriver, and moving both, keep working your way around the pipe using one screwdriver to keep the gap open and the second to continue separating.
  9. dubldare

    dubldare Plumber/Gasfitter

    Messages:
    286
    Location:
    MN/ND
  10. Bob NH

    Bob NH In the Trades

    Messages:
    3,317
    Location:
    New Hampshire
    RotoZip It!

    I have found lots of uses for a RotoZip. When you get one, you will wonder why it took so long.

    Put a 1/4" carbide router in it, with a cutting edge at least 1" long. Get a good grip on the RotoZip with both hands and gnaw a groove in the pipe you are trying to remove in at least two places. Then attack with the screwdriver, and maybe a little heat inside the 4" pipe.
  11. tp85

    tp85 New Member

    Messages:
    7
    lots of great suggestions.

    with two cuts in the inner pipe, would you expect the pipe to break free in large pieces? obviously with a little screw driver chiseling and prying.

    tom
  12. Bob NH

    Bob NH In the Trades

    Messages:
    3,317
    Location:
    New Hampshire
    You want at least two cuts with a wide kerf so the pieces don't interfere with each other as you pry them inward. Cuts won't really help with the unbonding; that's what the screwdriver is for.
  13. Lakee911

    Lakee911 I&C Engineer (mostly WWTP)

    Messages:
    1,328
    Location:
    Columbus, OH
    Fernco makes a coupler that goes on the OUTSIDE of the hub and reduces slightly to go on the OUTSIDE of the pipe (which would normally go inside the hub). It's a handy little 'animal.' http://www.fernco.com/PlSo.asp

    Jason
  14. tp85

    tp85 New Member

    Messages:
    7
    thanks. this solves all my problems. :D


  15. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    Good luck finding 1. I went through this once and it took 6 weeks to get 1 once I found a company that I could order from. You have to find a company that is a distributor/direct buyer from fernco as I couldn't find anyone that carried it due to the rarity of use. If you are in Boston, LA, NYC or a large metro area maybe you will find one. Fernco will not sell direct to anyone. At least 2 years ago they wouldn't.
  16. tp85

    tp85 New Member

    Messages:
    7
    :( yeah, already found that out the hard way.
    tom


  17. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,688
    Location:
    Cave Creek, Arizona
    pipe

    Either cut it out yourself using one of the methods already described or hire a plumber to do it. It is less that the minimum one hour labor time to do it. That is unless you have some special condition that makes a project out of it.
    Last edited: Nov 30, 2005
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